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Simplifying r2 + -9 = -12 Reorder the terms: -9 + r2 = -12 Solving -9 + r2 = -12 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + r2 = -12 + 9 Combine like terms: -9 + 9 = 0 0 + r2 = -12 + 9 r2 = -12 + 9 Combine like terms: -12 + 9 = -3 r2 = -3 Simplifying r2 = -3 Reorder the terms: 3 + r2 = -3 + 3 Combine like terms: -3 + 3 = 0 3 + r2 = 0 The solution to this equation could not be determined.
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